Year	Number
1996	24
1998	32.3383102416992
2000	25.3731346130371
2002	26.8656711578369
2003	21.3930339813232
2004	25.480770111084
2005	22.115385055542
2006	23.5576915740967
2007	23.0769233703613
2008	21.634614944458
2009	21.3270149230957
2010	23.6966819763184
2011	23.9436626434326
2012	24.8826293945313
2013	23.9436626434326
2014	22.1674880981445
2015	24.630542755127
2016	23.645320892334
2017	23.1527099609375
2018	23.3009700775146
2019	24.1545886993408
2020	26.0869560241699
2021	25.6038646697998
2022	27.5362319946289